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Osmoregulation and Excretion

Osmoregulation, the control of
water balance in animals, and excretion, the bodys waste disposal
system, are closely related processes. In this Lesson, well look
at how animals regulate the concentration of their body fluids, and
how waste materials are excreted by mechanisms of active transport.

Well go on to examine
different kinds of excretory systems: flame cells, Malpighian
tubules, nephridia, and vertebrate kidneys. The most complex and
compact excretory systems are those in the vertebrate kidney. Well
look in depth at the human kidney and its filtration system. Well
also study how hormones regulate kidney function and water balance
in the body.

Well finish by looking at
some of the causes of kidney failure, along with their treatments.